cos 4x = cos 2x find the general solution
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Answer:
cos 4x = cos 2x
if cos x = cos y
x = 2nπ ± y
cos 4x = cos 2x
Therefore
4x = 2nπ ± 2x
If we take +
4x = 2nπ + 2x
= 2x = 2nπ
= x = nπ
If we take -
4x = 2nπ - 2x
= 6x = 2nπ
x = 2nπ/6 = nπ/3
Therefore General Solution =
x = nπ or x = nπ/3
hope it helped
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Answered by
1
Answer:
Step-by-step explanation:
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